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Prev Professional Automotive Repair Technical Discussions for June 19, 2013
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Open Help Requests for GM
Help Request Answers
2000 Buick Park Avenue 3.8L compressor VIN: 1G4CW52K6Y
okay need help guys. this car came n from a used bye here pay here lot n town. had a lot of comm codes n it. the a/c system was low. so I charged it, and still the compressor would not come on. started 2 do some checkn on it and the hvac wasn't working properl...
2003 Cadillac DeVille 4.6L Brake Fluid Level VIN: 1G6KD54Y63
Will here we go.got a 2003 cady deville.brake light on dash. Check brake fluid level on message center.when we unplug the sensor the light goes out and so does the message on the message center. If we keep the sensor plugged in and remove it from the master cy...
2004 Chevrolet Classic LS 2.2L No Start VIN: 1G1ND52F94
At the ignition module intermdiate connector (this is where the module hooks to the coil tower) the noid light either doesn't flash or is dim and will not run. If the light is bright it runs. The issue seems to be the control (ground) ciruit for the coils is n... Trouble codes: B1379 (device ign 3 circuit), U1000 (loss of serial data for class 2), U1088 (loss of SRS/SDM comm)
2006 Chevrolet Impala LS 3.5L Rotor VIN: 2G1WB58K36
Came in with no pads left on the driver side (both sides were done within a year). We did: Front rotors, pads, and calipers - still weird shutter/vibration when braking, and left side is smoking. Did brakes hoses, bled ABS with a scanner, checked rear brakes. ...
2007 Chevrolet Avalanche LTZ 5.3L No Blower at any speed using A/C or Heat VIN: 3GNEC12007
Checked inputs to blower control module-Good except pulsed ground is present even when key is removed. Figured this would cause parasitic draw and drain BATT, but owner says NO. Jumped 12Vdc and ground to blower connector-Blower works fine. Replaced blower con...
2007 Chevrolet Suburban 1500 LTZ 5.3L engine VIN: 1GNFK16317
Hey folks. This is the bosses vehicle. The oil pressure gauge will go to zero or fluctuate from zero to normal pressure. Replaced the oil pressure switch 1st. The result was it had a good pressure reading for a few days. When the is occurring the scanner follo...
1996 GMC K3500 Sierra SL 7.4L Misfire, MIL Lamp on VIN: 1GTHK33J9T
Need help on this one.This truck keeps setting p0102 and p0175 code maf low volts and rich bank 2. when I first got the truck i found the maf sensor very dirty and a very dirty k & n. Cleaned filter and replaced maf sensor with denso unit. The light came back ... Trouble codes: P0102, P0175
2005 GMC Sierra 2500 HD SLE 6.6L Excessive Emissions, Surge, Misfire, Poor Fuel Economy, Black/white smoke VIN: 1GTHK23245
Thanks in advance for the help. Pulling my hair out on this one. we don't do a lot of diesel work here but enough. Mostly 6.0 Fords and Sprinter fleet work. This is my first real experience with a Duramax and its turning into a doozie. Truck is owned by a reti... Trouble codes: P0305 (Misfire), P0303, P0404, P0401 (EGR flow insufficent)
2007 GMC Yukon SLT 5.3L Hard start VIN: 1GKFK13087
Hi, this is my Bosses wifes vehicle and it is driving us nuts. The complaint was hard starting. I found it hard to start only when you shut it off hot then tried to restart a half hour later. Sounded flooded, seemed to crank real fast as if the cylinders were ...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L windows VIN: 1G4HP54K1Y
We removed the driver's seat and pulled the carpet back. We found wetness under the carpet and corrosion on the splice for the four BUS lines. We repaired the splice and all power windows and power locks now function. Thank you all for your help, it was gre...
2000 Chevrolet Malibu 3.1L high idle VIN: 1G1NE53J7Y
Well I beleive this one is fixed. Finally replaced IAC and pigtail and all seems to be well. As many suggested I never really did see anything out of the ordinary as far as data pids. Any way calling it fixed. Thank you to all.
2001 Chevrolet Silverado 2500 HD 8.1L Poor Fuel Economy VIN: 1GCHK23G31
i put a thermostat in the truck, i thought it may have been running a little cool. customer called and said hes run 2 tanks through it and its getting about 9 mpg and hes happy. thank you for all the replies. keith
2004 Chevrolet Silverado 2500 6.0L Misfire VIN: 1GCHK29U54
I believe this truck is fixed but the customer has not returned my follow-up phone call. I switched around the fuel injectors after being assured that the spark plug and plug wire and ignition coil swaps did not change anything. My misfire counts were very l... Trouble codes: P0300 (Random Cylinder Misfire Detected 1-40595 8-3015 all others 200), P0654 (Eng Spd Output Ckt Problem - Code is due to Inst. Clust. out for repair).
1998 Other GM Fleetwood 454CID Compressor inop VIN: 1GBKP37J5W
Thank you for your help. Tried disconnecting the battery. Jumped all three switches. Still no fix. Had to rewire the power supply to relay. Works good.
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